"I come to you now, at the turn of the tide." (Reference to Gandalf from Lord of the Rings when he returns as Gandalf the White)

What

"Why have I surfaced?"

"Convince me."

"Aid us in our plight."

"Enable my revenge."

"Spare the pleasantries."

Yes

"I'll make it so."

"This ought to tide you over."

"Our alliance binds me."

"By ebb and flow."

Attack

"Drown them all!"

"Land-born scum!"

"Fangs there!"

Warcry

"For Nazjatar."

Pissed

"Our tide.. is rising."

"In the depths, no one can hear you scream. Well they can, but it's really muffled." (reference to Alien)

"I think I have swimmers ear!"

"This world will be mine, and I'll start with the swimming pools."

"No sink shall be safe from… world domination!" (reference to an urban legend about baby alligators being bought as pets, getting flushed down the toilet when they grew too large and surviving and growing in the sewers)

"Iced tea is part of our two-pronged offensive."

"The day of our invasion shall be known as B-Day" (pronunciation similar to bidet)

Warning: Text below is by no means accurate, and is merely spelt phonetically, from what it sounds like to most; the Pit Lord's accent and syntax make it sound somewhat different to individual listeners.